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use crate::{
pubkey::Pubkey,
signature::{Signature, Signer, SignerError},
};
pub trait Signers {
fn pubkeys(&self) -> Vec<Pubkey>;
fn try_pubkeys(&self) -> Result<Vec<Pubkey>, SignerError>;
fn sign_message(&self, message: &[u8]) -> Vec<Signature>;
fn try_sign_message(&self, message: &[u8]) -> Result<Vec<Signature>, SignerError>;
}
macro_rules! default_keypairs_impl {
() => (
fn pubkeys(&self) -> Vec<Pubkey> {
self.iter().map(|keypair| keypair.pubkey()).collect()
}
fn try_pubkeys(&self) -> Result<Vec<Pubkey>, SignerError> {
let mut pubkeys = Vec::new();
for keypair in self.iter() {
pubkeys.push(keypair.try_pubkey()?);
}
Ok(pubkeys)
}
fn sign_message(&self, message: &[u8]) -> Vec<Signature> {
self.iter()
.map(|keypair| keypair.sign_message(message))
.collect()
}
fn try_sign_message(&self, message: &[u8]) -> Result<Vec<Signature>, SignerError> {
let mut signatures = Vec::new();
for keypair in self.iter() {
signatures.push(keypair.try_sign_message(message)?);
}
Ok(signatures)
}
);
}
impl<T: Signer> Signers for [&T] {
default_keypairs_impl!();
}
impl Signers for [Box<dyn Signer>] {
default_keypairs_impl!();
}
impl<T: Signer> Signers for [&T; 0] {
default_keypairs_impl!();
}
impl<T: Signer> Signers for [&T; 1] {
default_keypairs_impl!();
}
impl<T: Signer> Signers for [&T; 2] {
default_keypairs_impl!();
}
impl<T: Signer> Signers for [&T; 3] {
default_keypairs_impl!();
}
impl<T: Signer> Signers for [&T; 4] {
default_keypairs_impl!();
}
impl<T: Signer> Signers for Vec<&T> {
default_keypairs_impl!();
}
#[cfg(test)]
mod tests {
use super::*;
struct Foo;
impl Signer for Foo {
fn try_pubkey(&self) -> Result<Pubkey, SignerError> {
Ok(Pubkey::default())
}
fn try_sign_message(&self, _message: &[u8]) -> Result<Signature, SignerError> {
Ok(Signature::default())
}
}
struct Bar;
impl Signer for Bar {
fn try_pubkey(&self) -> Result<Pubkey, SignerError> {
Ok(Pubkey::default())
}
fn try_sign_message(&self, _message: &[u8]) -> Result<Signature, SignerError> {
Ok(Signature::default())
}
}
#[test]
fn test_dyn_keypairs_compile() {
let xs: Vec<Box<dyn Signer>> = vec![Box::new(Foo {}), Box::new(Bar {})];
assert_eq!(
xs.sign_message(b""),
vec![Signature::default(), Signature::default()],
);
let xs_ref: &[Box<dyn Signer>] = &xs;
assert_eq!(
Signers::sign_message(xs_ref, b""),
vec![Signature::default(), Signature::default()],
);
}
}